Mobile to account for 4.4% of all ad spending in 2017, study says

Despite a slow start, mobile advertising is gaining traction, and in five years, ads on phones alone should account for 4.4% of all types of advertising worldwide, including legacy media, according to projections by Berg Insight. The global market for ad spending on all mobile devices is projected to grow from last year's $5 billion to about $26 billion in 2017.